/* Avuya Theme System - v2.8.11 (Elite Adaptive Header & Overhauled Footer) */

/* 0. View Transitions & Performance */
@view-transition { navigation: auto; }

/* 1. Core Architecture: The Flair 9-Column Prose Grid */
.gh-outer { 
    display: grid; 
    grid-template-columns: 
        [full-start] minmax(var(--space-6), 1fr) 
        [wide-start] minmax(0, var(--space-16)) 
        [main-start] min(var(--container-width, 720px), 100% - var(--space-12)) 
        [main-end] minmax(0, var(--space-16)) 
        [wide-end] minmax(var(--space-6), 1fr) 
        [full-end]; 
    width: 100%;
}

.gh-outer > * { grid-column: main; }
.kg-width-wide { grid-column: wide; }
.kg-width-full { grid-column: full; }

.gh-inner { max-width: var(--container-width); margin: 0 auto; padding: 0 var(--space-6); width: 100%; }

/* 2. Elite Header System */
.gh-header {
    z-index: 1000;
    position: relative;
    display: flex;
    align-items: center;
    transition: var(--transition);
    background: var(--color-bg);
    min-height: 64px;
}

.gh-header-inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-8);
    width: 100%;
    padding: var(--space-4) 0;
    transition: all 0.3s ease;
}

@media (min-width: 1025px) { .gh-header-inner { padding: var(--space-6) 0; } }

.is-sticky-header .gh-header { position: sticky; top: 0; }

.is-scrolled .gh-header {
    background: color-mix(in srgb, var(--color-bg), transparent 20%);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.is-scrolled .gh-header-inner { padding: var(--space-2) 0; }

.gh-header.is-transparent:not(.is-scrolled) { background: transparent; border-bottom-color: transparent; }

/* 3. Branding & Responsive Logo */
.gh-header-brand { display: flex; align-items: center; gap: var(--space-4); transition: all 0.3s ease; }
.gh-header-logo { display: block; height: var(--logo-height-mobile, 28px); transition: height 0.3s ease; }
.gh-header-logo img { height: 100%; width: auto; object-fit: contain; display: block; }

@media (min-width: 1025px) {
    .gh-header-logo { height: var(--logo-height-desktop, 32px); }
    .is-scrolled .gh-header-logo { height: calc(var(--logo-height-desktop, 32px) * 0.85); }
}

[data-user-color-scheme="dark"] .logo-light { display: none; }
[data-user-color-scheme="light"] .logo-dark { display: none; }

/* 4. Header Actions */
.gh-header-actions { display: flex; align-items: center; gap: var(--space-4); transition: all 0.3s ease; }

.search-btn {
    background: none; border: none; padding: 0; cursor: pointer; color: var(--color-text-secondary);
    display: flex; align-items: center; justify-content: center; width: 32px; height: 32px;
    border-radius: var(--radius-md); transition: var(--transition);
}
.search-btn:hover { color: var(--color-link); background: var(--color-bg-alt); }
.search-btn svg { width: 20px; height: 20px; stroke-width: 2; }

.gh-btn.shadow-btn { box-shadow: var(--shadow-sm); border-bottom: none; }
.gh-btn.shadow-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

.gh-burger {
    display: none; background: none; border: none; padding: 0; cursor: pointer; width: 30px; height: 30px; 
    position: relative; color: var(--color-text); flex-direction: column; gap: 6px; align-items: center; justify-content: center;
}
.gh-burger-line { width: 20px; height: 2px; background: currentColor; transition: all 0.3s ease; border-radius: 2px; }

.is-menu-open .gh-burger-line:first-child { transform: rotate(45deg) translateY(5.5px) translateX(5.5px); }
.is-menu-open .gh-burger-line:last-child { transform: rotate(-45deg) translateY(-5.5px) translateX(5.5px); }

@media (max-width: 1024px) {
    .gh-burger { display: flex; }
    .gh-header-nav { display: none; }
    .gh-header-inner { grid-template-columns: auto 1fr; }
}

/* 5. Elite Footer Overhaul (Flair Spec) */
.site-footer { background: var(--color-bg); padding-top: var(--space-16); }
.site-footer-inner { position: relative; padding-bottom: var(--space-8); }

.site-footer-inner::before, .site-footer-bottom::before {
    content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 1px;
    background: linear-gradient(to right, transparent, var(--color-border), transparent);
}

.site-footer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
    padding: var(--space-12) 0;
}

@media (min-width: 768px) { .site-footer-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 1025px) { .site-footer-grid { grid-template-columns: repeat(6, 1fr); } }

.footer-brand { grid-column: span 2; display: flex; flex-direction: column; gap: var(--space-4); }
.footer-brand-logo { height: 28px; width: auto; object-fit: contain; align-self: flex-start; }
.footer-brand-description { font-size: var(--text-sm); color: var(--color-text-secondary); line-height: 1.6; max-width: 320px; }

.footer-nav-column { display: flex; flex-direction: column; gap: var(--space-4); }
.footer-nav-title { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); text-transform: uppercase; letter-spacing: 0.05em; margin: 0; }
.footer-nav-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.footer-nav-list a { font-size: var(--text-sm); color: var(--color-text-secondary); transition: var(--transition); }
.footer-nav-list a:hover { color: var(--color-link); }

/* Footer Social Icons */
.footer-socials { display: flex; gap: var(--space-2); align-items: center; margin-top: var(--space-2); }
.footer-social-btn {
    display: flex; align-items: center; justify-content: center; width: 36px; height: 36px;
    border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg);
    color: var(--color-text-secondary); transition: var(--transition);
}
.footer-social-btn:hover { border-color: var(--color-link); color: var(--color-link); background: var(--color-bg-alt); }
.footer-social-btn svg { width: 18px; height: 18px; }

/* Footer Bottom & Theme Toggle */
.site-footer-bottom {
    position: relative; padding: var(--space-6) 0; display: flex; flex-wrap: wrap; 
    align-items: center; justify-content: space-between; gap: var(--space-4);
}
.copyright { font-size: var(--text-sm); color: var(--color-text-secondary); }

.theme-toggle-btn {
    display: flex; gap: 2px; padding: 3px; border: 1px solid var(--color-border); 
    background: var(--color-bg-alt); border-radius: var(--radius-md); cursor: pointer; transition: var(--transition);
}
.theme-toggle-icon {
    display: flex; align-items: center; justify-content: center; width: 32px; height: 28px; 
    border-radius: var(--radius-sm); border: 1px solid transparent; opacity: 0.5; transition: all 0.3s ease;
}
.theme-toggle-icon svg { width: 16px; height: 16px; }

[data-user-color-scheme="light"] [data-theme="light"],
[data-user-color-scheme="dark"] [data-theme="dark"] {
    background: var(--color-bg); border-color: var(--color-border); opacity: 1; box-shadow: var(--shadow-sm);
}

/* 6. Navigation & Submenus */
.gh-header-nav ul { list-style: none; padding: 0; margin: 0; display: flex; align-items: center; gap: var(--space-1); justify-content: center; }
.gh-header-nav a { padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm); font-weight: 600; font-size: var(--text-sm); transition: var(--transition); color: var(--color-text); }
.gh-header-nav a:hover { background: var(--color-bg-alt); color: var(--color-link); }

.is-mainitem { display: flex; align-items: center; }
.is-mainitem button { background: none; border: none; padding: 0 var(--space-1); cursor: pointer; display: flex; align-items: center; transition: var(--transition); color: inherit; opacity: 0.6; }
.rotate-180 { transform: rotate(180deg); }

[data-nav="desktop"] [data-submenu] {
    z-index: 1000; position: absolute; top: calc(100% + 10px); left: 0; min-width: 220px; 
    background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); 
    box-shadow: var(--shadow-lg); padding: var(--space-2); display: flex; flex-direction: column; 
    gap: var(--space-1); opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition);
}
.is-mainitem[data-submenu-open] [data-submenu] { opacity: 1; visibility: visible; transform: translateY(0); }

/* 7. Design System & Variables */
:root {
    --spacing: .25rem;
    --text-xs: .75rem; --text-sm: .875rem; --text-base: 1rem; --text-lg: 1.125rem; --text-xl: 1.25rem; --text-2xl: 1.5rem; --text-3xl: 1.875rem; --text-4xl: 2.25rem; --text-5xl: 3rem;
    --space-1: calc(var(--spacing) * 1); --space-2: calc(var(--spacing) * 2); --space-3: calc(var(--spacing) * 3); --space-4: calc(var(--spacing) * 4); --space-6: calc(var(--spacing) * 6); --space-8: calc(var(--spacing) * 8); --space-10: calc(var(--spacing) * 10); --space-12: calc(var(--spacing) * 12); --space-16: calc(var(--spacing) * 16);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05); --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1); --shadow-lg: 0 9px 7px #0000001a;
    --radius-sm: .25rem; --radius-md: .375rem; --radius-lg: .5rem; --radius-xl: .75rem;
    --border-radius: var(--radius-xl);
    --color-bg: #ffffff; --color-bg-alt: #f9fafb; --color-text: #111827; --color-text-secondary: #4b5563; --color-heading: #111827; --color-border: #e5e7eb; --color-link: #3b82f6; 
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gh-font-heading: "DM Sans", sans-serif; --gh-font-body: "DM Sans", sans-serif;
    --font-heading: var(--gh-font-heading); --font-body: var(--gh-font-body);
    --container-width: 1280px;
}
[data-user-color-scheme="dark"] { --color-bg: #030712; --color-bg-alt: #111827; --color-text: #f3f4f6; --color-text-secondary: #9ca3af; --color-heading: #ffffff; --color-border: #1f2937; --color-link: #60a5fa; }

/* 8. Global Styles */
html { scroll-behavior: smooth; overflow-x: hidden; width: 100%; }
body { font-size: var(--text-base); line-height: 1.6; font-family: var(--font-body); color: var(--color-text); background: var(--color-bg); -webkit-font-smoothing: antialiased; margin: 0; overflow-x: hidden; width: 100%; }
h1, h2, h3, h4, h5, h6 { color: var(--color-heading); font-family: var(--font-heading); line-height: 1.2; font-weight: 700; margin-bottom: var(--space-4); text-wrap: balance; letter-spacing: -0.02em; }
a { color: inherit; text-decoration: none; transition: var(--transition); position: relative; }

/* 9. Utility Components */
.gh-btn { display: inline-flex; align-items: center; justify-content: center; padding: var(--space-2) var(--space-6); font-size: var(--text-sm); font-weight: 600; border-radius: var(--radius-md); transition: var(--transition); cursor: pointer; border: none; }
.gh-btn-primary { background: var(--color-link); color: var(--color-brand-contrast, #fff); }
.gh-btn-outline { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }

/* 10. Post Cards & Feeds */
.post-feed { display: grid; grid-template-columns: repeat(auto-fill, minmax(calc(18rem + 2vw), 1fr)); gap: var(--space-12); padding: var(--space-12) 0; }
.post-card { display: flex; flex-direction: column; background: var(--color-bg); transition: var(--transition); border-radius: var(--radius-xl); overflow: hidden; }
.post-card-title { font-size: var(--text-xl); line-height: 1.25; margin-bottom: var(--space-2); transition: var(--transition); font-weight: 700; }
.post-card:hover .post-card-title { color: var(--color-link); }

/* 11. Tag Filter */
.tag-filter { background: var(--color-bg); border-bottom: 1px solid var(--color-border); position: sticky; top: 80px; z-index: 900; transition: var(--transition); }
.is-scrolled .tag-filter { top: 64px; }
.tag-filter-scroll { display: flex; justify-content: center; gap: var(--space-2); padding: var(--space-4) 0; overflow-x: auto; scrollbar-width: none; }
.tag-filter-item { padding: var(--space-2) var(--space-5); border-radius: 100px; font-size: var(--text-sm); font-weight: 600; color: var(--color-text-secondary); white-space: nowrap; transition: var(--transition); position: relative; }
.tag-filter-item.active { color: var(--color-text); }
.tag-filter-item.active::after { content: ""; position: absolute; bottom: -11px; left: 50%; width: 24px; height: 3px; background: var(--color-link); transform: translateX(-50%); border-radius: 3px 3px 0 0; }

/* 12. Table of Contents & Share Hub */
.gh-toc-container { margin-bottom: var(--space-8); padding: var(--space-6); background: var(--color-bg-alt); border-radius: var(--radius-lg); border: 1px solid var(--color-border); }
.gh-toc-link.active { color: var(--color-link); font-weight: 600; }
.gh-share-hub { margin-top: var(--space-16); padding-top: var(--space-8); border-top: 1px solid var(--color-border); }
.gh-share-hub-copy.is-success { border-color: #22c55e; color: #166534; background: #f0fdf4; }

/* 13. Account Page */
.gh-account-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: var(--space-8); margin-bottom: var(--space-24); }
.gh-account-tile { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); transition: var(--transition); box-shadow: var(--shadow-sm); }
.gh-badge.active { background: #f0fdf4; color: #166534; border-color: #bbf7d0; }